Comparative Myocardial Deformation in 3 Myocardial Layers in Mice by Speckle Tracking Echocardiography

Table 1

Comparison between GE Vivid 7 and Vevo 2100 in 2D-speckle tracking hardware and software abilities.

Hardware abilities
	GE Vivid 7	Vevo 2100
Transducer frequency	10–14 MHz	18–38 MHz
Axial resolution	200 µm	50 µm
Lateral resolution	300 µm	110 µm
Transducer footprint	28 mm × 10 mm	20 mm × 5 mm
Temporal resolution	130–190 fps	>200 fps
Detect respiratory cycle	Yes	Yes
Image acquisition	Conventional	Hand-free + conventional
Area of analysis	Myocardium	Endocardium + epicardium
ROI adjustment	Uniform	Individual
Ability to distinguish E/A wave when heart rate is more than 400 bpm	No	Yes
Marked AVC	Yes	No
FAC	Manual	Automated

fps: frame per second, AVC: aortic valve closure, and FAC: fractional area change (defined as cross-sectional area change between end diastole and end systole).